Principles of cathodic protection materials for pipelines

Cathodic protection technology refers to the electrochemically polarized metal structure that needs to be protected, so that its potential is shifted to negative direction.  A method of attaining the position of being in a cathodic, or protected, state in an ambient medium.  

Cathodic protection technology is a kind of electrochemical protection technology, the core of which is to move the metal potential to the negative direction in the electrolyte environment to achieve the corrosion free potential.